<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <script type="text/javascript" src="../assets/js/vue.js"></script>
    <title>V-for 案例</title>
</head>

<body>
    <h1>v-for指令用法</h1>
    <hr>
    <div id="app">
        <ul>
            <li v-for="item in sortItems">
                {{item}}
            </li>
        </ul>
        <ul>
            <li v-for="student in students">
                {{student.name}} - {{student.age}}
            </li>
        </ul>
        <ul>
            <li v-for="(student,index) in sortStudent">
                {{index}}：{{student.name}} - {{student.age}}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        var app = new Vue({
            el: '#app',
            data: {
                items: [20, 23, 18, 65, 32, 19, 5, 56, 41],
                students: [{
                        name: 'jspang',
                        age: 32
                    },
                    {
                        name: 'Panda',
                        age: 30
                    },
                    {
                        name: 'PanPaN',
                        age: 21
                    },
                    {
                        name: 'King',
                        age: 45
                    }
                ]

            },
            computed: {
                sortItems: function () {
                    return this.items.sort(sortNumber);
                },
                sortStudent: function () {
                    return sortByKey(this.students, 'age');
                }
            }
        });

        function sortNumber(a, b) {
            return a - b
        }
        //数组对象方法排序:
        function sortByKey(array, key) {
            return array.sort(function (a, b) {
                var x = a[key];
                var y = b[key];
                return ((x < y) ? -1 : ((x > y) ? 1 : 0));
            });
        }
    </script>
</body>

</html>